A Study on Eutrophication Level in Hosur Town Lakes

The present concern for eutrophication relates to the rapidly increasing quantities of nitrogen and phosphorus which are otherwise present at fairly low concentrations in unmodified natural waters to limit the algal growth and biomass. In the present study an attempt has been made to measure the level of eutrophication in Hosur town lakes. Three lakes namely Chandrakudi lake, Doddan lake and Kelavarapalli dam were selected for the study. The samples were collected and analysed for soluble orthophosphate, chemical oxygen demand, organic nitrogen, free ammonia, inorganic nitrogen, total phosphorus and dissolved oxygen, etc. The onsite study like transparency, fish kill information and impairment of lakes, etc. was also conducted. The level of eutrophication in the lakes was calculated by using Wetzel's scheme. The results revealed that the eutrophication level in all the three lakes is very high, i.e., hypereutrophic to very eutrophic.